Within ninety days from the date of his receipt of the report and recommendations submitted by the Commission under section 7941 of this title, notwithstanding the limitations contained in section 7911(6)(A) and in section 7925(a) of this title, if the Commission determines, based on such study, that such sites cannot be regulated and controlled by the State or the Commission in the manner described in section 7941 of this title, the Secretary may designate either or both of the sites referred to in section 7941 of this title as a processing site for purposes of subchapter I. Following such designation, the Secretary may enter into cooperative agreements with New Mexico to perform remedial action pursuant to such subchapter I concerning only the residual radioactive materials at such site resulting from uranium produced for sale to a Federal agency prior to January 1, 1971, under contract with such agency. Any such designation shall be submitted by the Secretary, together with his estimate of the cost of carrying out such remedial action at the designated site, to the Committee on Interior and Insular Affairs and the Committee on Energy and Commerce of the House of Representatives and to the Committee on Energy and Natural Resources of the Senate.

Except as otherwise specifically provided in subsection (a) of this section, any remedial action under subchapter I with respect to any sites designated under this subchapter shall be subject to the provisions of subchapter I (including the authorization of appropriations referred to in section 7922(b) of this title).